Method of making lateral connectrons in underground cables



(No Model.)

S. P. DENISON.

METHON OF MAKING LATERAL CONNECTIONS IN UNDERGROUND GABLES.

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1 UNITED S rnfr s PATENTQOFEICE.

SYLVESTER P. nnrus'on, OF BROOKLYN, j'NEw. YoRigAssIeNonTo GEORGE R. THOMPSON, on- PHILADELPHIA, rn NsYLvAN A.

,METHQD OF more LATERAL couucnoiism ti e-Bouncers;

summaries formingpart of Letters Patent No, 413,1:34,-'date21 we. 15, 1889. g a driginal application filed m 27, 1889, Serial No. 3 18,918. mean and an application 516d se nnm 21, 1889. shin ml 324,613. (Nomodeh)-.-

To all whom itmay concern:

Be it known that I, SYLVESTER P. Dnmsox, of Brooklyn, county of Kings, State of New York, have invented a new and Improved 5 Method-of Making Lateral Connection-Joints with Underground Conductors, of, which the foll0w'mg is a specification. I The invention relates to electrical conduits in which cables or conductors are incalsed in metal pipessuch, for instance,as have been laid in the subways of New York city, where series of parallel iron pipes in quite close proximity, into which the cables are drawn, are buried in cement and extend from manhole to 1nan-hole. The; pr o blen 1 (i practically making house or lateral connections with the conductors within the pipes has been a serious one. It has bcen proposed (and practiced to a certain extent) to lay at interzovals lateral connection-boxes into which the pipes lead,and when wires are to be brought out for a houseconnection the box must be located and reached. This is an objectionable method for several reasons: Fi 1st, the first cost of such a conduit is excessively increased, since to make the system at all practicable a sufficient number, of such boxes must be laid to meetprospective demands; second, the lateral connections can only be made at the points where boxes are located, and, third, in threading cables into the pipes the boxes form obstructions, and as several pipes usually lead into and out of a box the pilot-head is liable in leaving the'box to enicr thcwrong pipe and lead thecable intoit. All these objections are ciwie'atczl by my method of making sucheonnecions, as I can connectat any point with any of the exposed oroutcr pipes of the bank or series forn ing the con- 0 duit.

I proceed as foilowszAi. any point along the line of the conduit where it is desired 10 make a lateral connection with one or U101: of the pipes or cables I expose the desired pipe of the conduit, and by two 10!: gitudinal cuts and two transverse cuts extending around the pipe at. the ends-oi the longitudinal unis, made by means of any suitable tools, l cut out a short section of the pipe withoutentting or injuring the covering of the inclos ed 5o cable. I then open {the cable, bring outithedesired conductors,make the lateral connections with them, and jproperlyin anipulate' and treat the joinfl'thus made in i the sheath of the cable.' This breakinthe cbntinuityof thepipe is then bridged andthe cable pro-. teefcd by a coupling formed intwo 'lon'gitudi- I nal halves, one of whichhas a laterally-pro jectingitube, through which the lateral conductors running to the house are passed. 6:

The coupling" being properly secured and packed, the cable is as fthoroughly'protected asif the pipe had not been cut, and thecoup ling being of general tubular shape andconstit uting a prolongation or. section of meson-'- 6 5 do i t-pipe it offers no obstruction to the threadingof'a cable therein, and does not permit of he possibility of a cable being drawn into an adjoining pipe-ea thing liable to occur with the ordinary coupling-boxes now in use, as 7cabove mentioned.

lhc accompanying drawings illustrate a pipe-coupling for carrying out my invention.

Figure l is a plan. partly in section; Fig. 2, an elevation, par .y in sect-ion; Fig. 3,a transverse section 0 the line 3 3 of Fig. 2; Fig. 4, an end vie showing the conduit-pipe in scctiong'and Fig. 5, a diagram view indicating th ends of. a conduit-pipe from which a section as been cut, the incloscrl cable, the So coupling, and the lateral connections loading therefrom through the passage in the sidc of the coupling.

A indicates the cable;;a a, the lateral or house connections leading therefrom, and B B the ends of a conduit-pipe from which a see tion that is replaced by the coupling has been car without injuring thc'cablc, as above described. The coupling, consistsot a lower section C, having semicircular ends 0, in which 0 the ends B1) of the conduit-pipclic, and a lateral projection or tube a, through which the house-connections u a, are passed. On each side the lower section}?- is formed with a lon gitudinul recess or packing-groove which at he semicircular ends I; run along their inner edges, as seen at c" in Figs. 1 and 4. A half-collar l) is place over each end of the conduit-pipe, and is bolt-ed to the end 0, so as to clamp the end of the pipe between them. This collar has a packing-groove (1- along each edge, Fig. 4, corresponding with the grooves 0 "This joint is of course to be leaded or suitably packed to render it tight. The exterior face of each collar D has formed in it lowing manner: Two clamps F, having inwardly-projecting hooks f upon their ends, are slipped over the coupling, so that they hook under the flanges y of ,the lower section 0. Screw bolts F, passing through the tops of theclampsbear upon the top of the cover -E and firmly secure it. w The edges f of the hooks f and the under face '11 of thefiangey j are .inclined as shown, so that theytendto draw the ends of the clamps inwardly.

\Vhere the coupling is used for conduitpipes laid comparatively closely in tiers or banks, the parts are of course so proportioned and the width of the flanges y and hooked ends f of the clamps is such as to permit the passage of the ends of the clamps between adjoining pipes.

No claim is made to the apparatus described and shown herein, as it forms the subject-matter of another application filed by me July 27,-1889, Serial No. 318,916, of which this case is a division.

I claim as my invention- The herein-descri'i '-d method of making lateral house connections with conductors inclos in conduit-pipes, which method consists in cutting out a section of the conduitpipe without inj uring the inclosed conductors or cable, making the lateral connections with the conductors in the pipe, couplingthe ends of the conduit-pipe bya closed sectional coupling, and leading out the house-connections through a lateral passage in said eoup-.

ling.

scribed my name.

SYLVESTER P; DENISON.

a -Witnes'ses:

EDW'ARI) (J. DAVIDSON, MAMIE J. KELLEY.

In testimony whereot'l have hereunto sub- 

